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CONSOLIDATED STATEMENTS OF NET (LOSS) INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 28, 2018	Jan. 29, 2017
Income Statement [Abstract]
Net sales	$ 85,310	$ 76,169	$ 245,541	$ 232,194
Cost of sales	67,707	59,410	195,668	180,115
Gross profit	17,603	16,759	49,873	52,079
Selling, general and administrative expenses	9,959	9,824	28,876	29,171
Income from operations	7,644	6,935	20,997	22,908
Interest expense	31		69
Interest income	(132)	(124)	(391)	(164)
Other expense	229	69	903	376
Income before income taxes	7,516	6,990	20,416	22,696
Income taxes	8,208	643	11,956	6,560
Loss from investment in unconsolidated joint venture	56		249
Net (loss) income	$ (748)	$ 6,347	$ 8,211	$ 16,136
Net (loss) income per share, basic	$ (0.06)	$ 0.52	$ 0.66	$ 1.31
Net (loss) income per share, diluted	$ (0.06)	$ 0.51	$ 0.65	$ 1.29
Average shares outstanding, basic	12,436	12,313	12,425	12,302
Average shares outstanding, diluted	12,436	12,544	12,626	12,517

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